Detecção e Classificação de Câncer a partir de Mamografias Digitalizadas e Redes Neurais Convolucionais
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Data
2018-05-29
Autores
Dalvi, Rodolfo de Figueiredo
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Universidade Federal do Espírito Santo
Resumo
In this work, two methodologies based on convolutional neural networks were developedwith the objective of performing the classification of breast cancer in a digital mammographyimage. Firstly, we sought a simpler methodology that, from regions marked in the database,identifies whether they are normal or carcinogenic regions. In this way, expressive resultswere obtained, with an accuracy of 99.41%, sensitivity and specificity of 98.57% and100%, respectively. In order to seek greater applicability of the proposed methodology,an improvement of the first methodology was made, making it independent of an initialmarking. In the second methodology is performed a pre-processing of the image andthen segment the potential candidates for cancer. Each candidate is classified as normalor carcinogenic by a convolutional neural network. Finally, carcinogenic candidates areclassified as benign or malignant, also using a convolutional neural network. Relevantresults were obtained considering the difficulty of the problem, reaching an accuracyof 91.89%, sensitivity of 88.52% and specificity of 96.00% for cancer detection, and anaccuracy of 82.14% , sensitivity of 81.48% and specificity of 82.75% for the classificationof the type of cancer.
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Breast cancer , Mammography , Computer Aided Diagnosis , Rede neural convolucional , Segmentation , Câncer de mama , Diagnóstico assistido por computador , Convolutional neural network , Segmentação